换流站交流滤波器用避雷器过电压仿真建模因素  

Modeling Factors for Overvoltage Simulation of Lightning Arrester for AC Filter in Converter Station

作　　者：罗新 邓俊文 邓京 黄学民 韩永霞[2] LUO Xin;DENG Junwen;DENG Jing;HUANG Xuemin;HAN Yongxia(Guangzhou Bureau of CSG EHV Power Transmission Company,Guangzhou 510663,China;South China University of Technology,Guangzhou 510640,China)

机构地区：[1]南方电网超高压输电公司广州局,广州510663 [2]华南理工大学,广州510640

出　　处：《南方电网技术》2021年第2期99-106,共8页Southern Power System Technology

基　　金：特高压工程技术(昆明、广州)国家工程实验室开放基金资助项目(NEL201704)。

摘　　要：对交流滤波器用避雷器开展准确的过电压仿真计算是其绝缘设计及稳定运行的基础。本文采用逐渐细化模型的建模方式,开展了滤波器投入和交流母线接地故障工况下的建模及仿真计算,分析了交流滤波器杂散参数、交流滤波器场内外线路的π型等效电路和交流滤波器保护策略中3种建模因素对交流滤波器用避雷器过电压仿真结果的影响。仿真结果表明:在上述工况下,考虑3种参数后与考虑前相比,避雷器过电压变化-4%~25%,电流下降36.2%~62%,吸收能量上升16%~214%,因此若在绝缘设计中不考虑上述因素,避雷器电压电流设计值将产生较大偏差,能量设计值会偏小,影响交流滤波器正常运行。The accurate simulation calculation of overvoltage of arrester for AC filter is the basis of its insulation design and stable operation.In this paper,the modeling and simulation calculation under the condition of filter input and AC bus grounding fault are carried out by using the modeling method of gradually refining model.The effects of stray parameters of AC filter,π-type equivalent circuit of lines inside and outside the AC filter field and protection strategy of AC filter on the overvoltage simulation results of lightning arrester used in AC filter are analyzed.The simulation results show that under the above operating conditions,after considering the three parameters,the overvoltage of the arrester changes-4%~25%,the current decreases 36.2%~62%,and the absorbed energy increases 16%~214%.Therefore,if the above factors are not considered in the insulation design,the voltage and current design value of the lightning arrester will have a large deviation,and the energy design value will be small,which will affect the normal operation of the AC filter.

关 键 词：交流滤波器 避雷器 杂散参数 π型等效电路 保护策略 换流站 

分 类 号：TM477[电气工程—电器] TM862